Sound board



Aug. 2, 1932. J, BUCKLEY 1,870,171

SOUND BOARD Filed Oct. 22, 1931 xwnwsmsnmmr@MNQ Patented Aug. 2, 1932 UNITED STATES LEO J. BUCKLEY, OF BINGHAMTON, NEW YORK SOUND BOARD This invention relates to an improvement in sound boards and is adapted to be applied to loud speakers or reproducers particularly for radio receiving and television sets.

One of the objects of the present invention was to provide a sound board designed to control the tones through large or small openings and with the use of thin or thick wood leaving the face of the board intact. By this practice one can make the tones hollow, thin, or

round and soft. By'the application of this sound board it absorbs the mechanism disturbances which mar radio enjoyment. It

'7 Q cuts out distortion and vibration of the tones.

It provides unlimited advantages to the designer by eliminating the silk cloth and visible openings now used.

Cabinets can be made of all wood to be t practical for household furniture and relieving any metallic sounds that may arrive from metal parts.

By employing this sound board considerable expense can be eliminated in the manufacture of radio or television cabinets. The

- 3 simplicity is so unique it can be combined with any period furniture without deviating a single particle. It applies itself to more designs of furniture than any other instrument board.

In the accompanying drawing:

Fig. 1 is a perspective view of a radio receiving set showing the invention applied thereto.

Fig. 2 is a sectional view through the sound .tion thereof.

My improved sound board 3 is preferably constructed entirely of wood and it is intended to be placed immediately in front of the radio loud speaker designated in Fig. 1 by the nu- .meral 4 but in order to improve the appearance of the front of the set it is desirable to Application filed October 22, 1931. Serial No. 570,489.

leave the face of the board intact and unperforated.

In the form shown in Figs. 2 and 8 the sound board 3 is built up of a thick wooden core 5 having an enlarged opening 6 therein and into which is inserted a cork plug 7 to fill the hole. Thin strips of veneer 8 and 9 are then secured as by gluing over the opposite sides of the core 5 and the front veneer ply 8 is preferably of selected soft wood to give an improved finish to the front of the cabinet.

This ply of veneer is preferably of about one-sixteenth or one-twentieth of an inch in thickness and has its whole surface glued or otherwise secured to the face of the core 5 and the face of the cork plug 7 Perforations 10 are formed in the back face i of the sound board through the backply 9 and the cork plug 7 but extending only to the back face of the face ply 8 so that the ends of these perforations do not project to the face of the sound board and are spaced therefrom a distance of approximately one-sixteenth or one-twentieth of an inch leaving small diaphragms closing the ends thereof.

The size of the perforations 10 may be 7 varied to suit the requirements of the receiving set with which it is associated and upon being increased or decreased the tones may be substantially changed.

WVhile I have referred to the plug 7 as being of cork nevertheless this plug may be made of other materials as desired such as glued saw dust and possibly many other materials which will not interfere with the sound vibrations or distort the tones.

In Fig. 4 I have shown a sound board 3av of a single ply thickness in which perforations 10a are formed on the backside thereof but which do not extend through to the face being spaced therefrom a sufficient distance to form small diaphragms as above described.

In Fig. 5 the board 3?) has perforations 10b therethrough but a face ply of veneer 86 covers the face of the board and ends of the perforations.

In Fig. 6 I have shown the core inclosed by veneer plies 90 and 80 on the back and face thereof as described above inconnection with Fig. 2 but an enlarged opening 100 is formed a In Fig. 7 I have omitted the back ply 90 number of relatively leaving the core 5d and the face ply 8d, the enlarged opening 10d being formed in the core.

In all of these forms the sound board is preferably built of soft wood throughout.

If desired however other materials may be used in place of wood such as composition fiber, pressed paper and the like but it is be lieved that wood gives improved results.

I have therefore provided a sound board with all of the advantages of increased design in practical furniture cabinets, all wood cabi- .ets, and it incloses the operating mechanism in a dust-proof case and eliminates the siik cloth and visible openings. Its simplicity is so unique that it may be combined with any furniture desired and affords rich mellow tones of varying degrees and qualities.

My sound board is adapted to close the front of the loud speaker cabinet but has no vibratory connection with the operating parts of the loud speaker, the diaphragm or diaphragms formeo at the forward ends of the perforations being effected only by the sound waves.

I claim:

1. A sound board comprising a core having one or more perfon ms f rmed therein and extending through the core, and a sheet of relatively thin veneer secured to the face of the core and closing the ends of the perforations.

2. A sound board comprising a thick core having one or more perforations extending entirely therethrough and open to the back of the board and a ply of rel. #ivcly thin wood veneer glued to the face of the core and over the ends of the perforations to close the perforations at the front of the board.

3. A sound board having a substantial small perforations ex tending from the back face toward the front face and terminating in spaced re .tion from the front face of the board with the forward ends of the said perforations closed.

4. A sound board having large number of relatively small perforations extending from the back face of the board toward the front face, said back face having the ends of the perforations open to receive sound vibrations, the perforations terminating in spaced relation from the front face of the board and having the forward ends closed by relativelythin diaphragms.

5. A sound board comprising a core memher having a large number of relatively small perforations extending entirely therethrough and open to the back of the board, and a sheet of relatively thin veneer glued to the ing a plug of relatively soft non-metallicmaterial fitted therein, said plug having a large number of relatively small perforations extending therethrough from the back face of the board to the front face of the core and a sheet of thin veneer glued to the face of the core and closing the forward ends of the perforations;

7. A sound board comprising a core having a plug of cork fitted therein, said plug having a relatively large number of small perforations extending therethrough from the back face of the board to the forward face of tne core and plug, and means covering the forward ends of the perforations forming small diaphragms in said ends.

8. A sound board for a loud speaker comprising a wooden core having an enlarged cork plug fitted therein a ply of wood veneer glued to the back face of the core and plug, said plug having a large number of small perforations extending therethrough and through the back piy of veneer to be open to the. sound v 3 ions of the loud speaker, and a face ply of relatively thin veneer glued to th faces of the core and plug and closing the ferward ends of theperforations.

9. Asound board adapted to be disposed in front of a sound reproducer and having an opening extending from the back face toward the front face and terminating in rearwardly spaced relation from said front face providing a diaphragm in said front face.

10. A sound board adapted to be disposed in frontof a sound'reproducer and having an enlarged opening extending from "the back face of the board toward the front face thereof and terminating in rearwardly spaced relation from said front face providing a sound diaphragm in said front face, said diaphragm being arranged in spaced relation from operating partsof the reproducer.

In testimony whereof I aflix my signature. 

